Newbie: it appears tank hoses don't come with new trailer

In 2007 when I bought my first RV, the dealer gave me a cheap hose. It lasted, maybe, a season. I replaced it with a similar hose. Similar results. Finally, I bought a Rhino hose due to recommendations on this board. Actually, I bought two because of my history with hoses. It is now over 10 years later, and I still have not opened the second Rhino hose.